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There is insufficient glucose for cellular respiration, fatty acids can be changed to acetyl CoA - VCE - SSCE Biology - Question 12 - 2014 - Paper 1
Question 12
There is insufficient glucose for cellular respiration, fatty acids can be changed to acetyl CoA. Each fatty acid X molecule produces eight molecules of acetyl CoA. ... show full transcript
Worked Solution & Example Answer:There is insufficient glucose for cellular respiration, fatty acids can be changed to acetyl CoA - VCE - SSCE Biology - Question 12 - 2014 - Paper 1
Step 1
Most of the ATP is made in the Krebs Cycle.
Answer
In cellular respiration, a significant amount of ATP is generated during the Krebs Cycle (also known as the citric acid cycle). This process occurs after glycolysis and involves the oxidation of acetyl CoA. The Krebs Cycle produces ATP directly and generates electron carriers that are utilized in the electron transport chain to produce additional ATP.
Step 2
Pyruvic acid is converted to acetyl CoA under anaerobic conditions.
Answer
Under anaerobic conditions, pyruvic acid does not convert to acetyl CoA but rather undergoes fermentation processes, such as lactic acid fermentation or alcoholic fermentation. Therefore, this statement is incorrect.
Step 3
No ATP can be formed from the breakdown of glucose under anaerobic conditions.
Answer
Glucose can still produce some ATP under anaerobic conditions through glycolysis. However, it is much less efficient compared to aerobic respiration, where further ATP is generated in the Krebs Cycle and through oxidative phosphorylation.
Step 4
One fatty acid X molecule produces more ATP in aerobic conditions than one glucose molecule does.
Answer
Fatty acids undergo beta-oxidation to produce multiple acetyl CoA molecules, leading to a higher yield of ATP compared to the complete oxidation of one glucose molecule. Each fatty acid X can generate a significant amount of ATP during aerobic respiration, indicating it does produce more ATP than one glucose molecule.